Examine source code of Color Changer

{
  "manifest_version": 2,
  "name": "Color Changer",
  "version": "4.0.9",
  "description": "Change a page's text, background, and link colors to your liking.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.ts"
      ]
    }
  ],
  "web_accessible_resources": [
    "icons/icon.svg"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; default-src 'self'",
  "background": {
    "scripts": [
      "background.ts"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "contextMenus",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{710c08fd-7b58-4cf7-bca4-1a10f1c0ed9e}"
    }
  }
}